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Re: Microtonal key signatures fix
From: |
Benkő Pál |
Subject: |
Re: Microtonal key signatures fix |
Date: |
Fri, 25 Feb 2011 11:18:01 +0100 |
>> huh, I understand less and less. I'll try this example;
>> my meantone tests are not crashing, they produce
>> correct MIDI (at least it sounds correct - I didn't think
>> MIDI has a concept of key signature); the signature
>> is missing from the score, though.
>
> If the key signature is missing from the score, it suggests
> the scale it's based on wasn't scaled to give the new
> tuning. So the correct alteration doesn't exist.
>
> Yes, there's a key signature in MIDI. It looks something
> like FF5902FF for F major (1 flat) or FF590201 for G major
> (1 sharp).
oh, interesting. but that makes the pieces of informations
fit together!
>> Graham sent me an example, but 2.13.51 couldn't
>> compile it. I want to work on that too.
>
> That's a shame. I'm way behind in my versions, but I
> didn't think anything that was working was going to break.
>
> This code for key signatures has always worked:
>
> \set Staff.keySignature = #(scale-key-sig '((6 .
> -1/2)) tuning)
>
> Without the function, something like
>
> \set Staff.keySignature = #'((6 . -12/31))
>
> It avoids trying to send the key signature to MIDI.
ok, thanks! I think now I understand the issue:
MIDI signature must be a conventional one in equal
temperament - is this true? then your patch is
obviously ok.
p